﻿#region License

// Dimebrain TweetSharp
// (www.dimebrain.com)
// 
// The MIT License
// 
// Copyright (c) 2009 Dimebrain
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// 

#endregion

using System;
using System.Collections.Generic;
using System.Reflection;
using Dimebrain.TweetSharp.Core.Attributes;

namespace Dimebrain.TweetSharp.Core.Extensions
{
    internal static class ReflectionExtensions
    {
        public static IEnumerable<T> GetCustomAttributes<T>(this PropertyInfo info, bool inherit) where T : class
        {
            var attributes = info.GetCustomAttributes(typeof (T), inherit);
            return attributes.ToEnumerable<T>();
        }

        public static void SetValue(this object instance, string property, object value)
        {
            var info = instance.GetType().GetProperty(property);
            info.SetValue(instance, value, null);
        }

        public static bool RequiresAuthentication(this Enum value, bool isMandatory)
        {
            var field = value.GetType().GetField(value.ToString());
            var attributes = (RequiresAuthenticationAttribute[])field.GetCustomAttributes(typeof(RequiresAuthenticationAttribute), false);

            if(attributes.Length > 0)
            {
                var attribute = attributes[0];
                if (isMandatory) return attribute.IsRequired;
                return !attribute.IsRequired;
            }
            
            return false;
        }

        public static AuthenticationScheme GetScheme(this Enum value)
        {
            var field = value.GetType().GetField(value.ToString());
            var attributes = (RequiresAuthenticationAttribute[])field.GetCustomAttributes(typeof(RequiresAuthenticationAttribute), false);
            if (attributes.Length > 0)
            {
                var attribute = attributes[0];
                return attribute.Scheme;
            }
            return AuthenticationScheme.None;
        }

        public static bool RequiresApiKey(this Enum value)
        {
            var field = value.GetType().GetField(value.ToString());
            var attributes = (RequiresApiKeyAttribute[])field.GetCustomAttributes(typeof(RequiresApiKeyAttribute), false);

            return attributes.Length > 0;
        }
    }
}